> Jonathan Gibson Wrote:
> Yes forgot to say I'm in the UK. The cylinder is non existent, it's
> basically the bottom end. I bought it thinking it was a 6 speed. It's
> wasn't. The piston was seized to the cylinder, had to cut the cylinder
> off. The Conrod is damaged but I was guessing you would rebuild it
> anyway. Have you looked on the minarelli p6 shop on Facebook? I don't
> speak Italian but they have alot of bits going on there. What bike is it
> for? Mine was meant to be for a peripoli Oxford. Got to repaint and
> rebuild it.
Yeah I'm in the US so I didn't really want to try and ship anything from over seas. It's not for a specific bike, I'm embarking on a project to build a 50cc Grand Prix esque moto gp style racer (Think Kreidler Va Veen or Derbi Angel Nieto full fairing style). After a lot of research and consideration I decided the Minarelli P4/6 engine would be the best platform for it. Unfortunately, they are far and few between in the US.
Surprisingly enough though, a few of these engines were actually imported in the 70s ish on behalf of the Indian motorcycle company for some of their dirt bikes. The coolest part is that they came in a few different flavors on displacements: 50cc, 70cc, 75cc, and 80cc, as well as with two different transmission: 4 and 6 speed.
Luckily I was actually able to snag a 75cc P6 (they call this, I believe, the P675 engine off of the Indian MX76 or 74) yesterday on eBay for under $200 with a dellorto carb. I was told that it came off either an ME or MX 75 bike, and the cases have 75cc and P6 imprinted on them. There is a lot of information on these bikes here, but looking at catalog scans I can't find any that use 75cc P6 engines, only 70cc. So I am not sure of if it is a 4 or 6 speed but we will find out. I'll attach a picture of the same type of engine so you can see what I mean.
I have a feeling the gearing is going to be a lot different than some of the P6s that are overseas for grand prix style asphalt racing, favoring the low end torque needed for dirt racing, but it's pretty wicked that it's already 75cc. And I'll likely go with a smaller than normal rear sprocket to attempt to compensate this difference. But, I won't even need to kit it! An extremely similar engine, possibly even the same model, sold here on moped army a couple years ago. You can find it if you search 'FS: Minarelli P6".
Sorry that was long and you didn't ask for all that information lol but I figured it might be useful for someone else in the future. I'll likely be creating a separate thread to discuss these engines and also to document my build.